J/MNRAS/499/4040ivo://CDS.VizieR/J/MNRAS/499/4040doi:10.26093/cds/vizier/bg-fk-3y8CDSMuraveva T.Clementini G.Garofalo A.Cusano F.2026-08-03T07:30:24Z2023-11-08T07:34:26ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvariable-starsdwarf-galaxiesvisible-astronomytrigonometric-parallaxproper-motionsWe present a catalogue of 285 RR Lyrae stars (RRLs) in the Draco dwarf spheroidal (dSph) galaxy, obtained by combining data from a number of different surveys including the Data Release 2 (DR2) of the European Space Agency cornerstone mission Gaia. We have determined individual distances to the RRLs in our sample using for the first time a Gaia G-band luminosity-metallicity relation (M_G_-[Fe/H]) and study the structure of the Draco dSph as traced by its RRL population. We find that the RRLs located in the western/south-western region of Draco appear to be closer to us, which may be a clue of interaction between Draco and the Milky Way. The average distance modulus of Draco measured with the RRLs is {mu}=19.53+/-0.07mag, corresponding to a distance of 80.5+/-2.6kpc, in good agreement with previous determinations in the literature. Based on the pulsation properties of the RRLs, we confirm the Oosterhoff-intermediate nature of Draco. We present an additional sample of 41 candidate RRLs in Draco, which we selected from the Gaia DR2 catalogue based on the uncertainty of their G-band magnitudes. Additional epoch data that will become available in the Gaia Data Release 3 will help to confirm whether these candidates are bona fide Draco RRLs.2020MNRAS.499.4040Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/499/4040CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/136/1921 : Variable stars of Draco dSph (Kinemuchi+, 2008)J/A+A/622/A60 : Gaia DR2 misclassified RR Lyrae list (Clementini+, 2019)B/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017)J/AJ/153/204 : RR Lyrae stars from the PS1 3{pi} survey (Sesar+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/499/4040https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/499/4040http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/499/4040https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/499/4040https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/499/4040http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/499/4040GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/499/4040/table1 (Characteristics of our final 285 RRLs in Draco)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/4040/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/4040/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/4040/table1?GETtext/xml+votable180.050000true260.3860158.584630.005555555555555556Cone search capability for table J/MNRAS/499/4040/table3 (RRLs whose membership to Draco is uncertain)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/4040/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/4040/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/4040/table3?GETtext/xml+votable180.050000true261.4095157.299980.005555555555555556Cone search capability for table J/MNRAS/499/4040/table4 (Characteristics of 51 candidate RRLs discarded from the Draco RRLs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/4040/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/4040/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/4040/table4?GETtext/xml+votable180.050000true258.0453457.229150.005555555555555556Cone search capability for table J/MNRAS/499/4040/table5 (Candidate RRLs in Draco selected from the Gaia DR2 catalogue based on the dispersion of their G-band magnitudes ({sigma}_G_))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/4040/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/4040/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/4040/table5?GETtext/xml+votable180.050000true261.5958857.963860.0055555555555555565/2545 2547 6/10093-10095 10106 10177 10185 10187 10192 10194 10200 10209 102121.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/499/4040?format=asciiOpticaldefaultJ/MNRAS/499/4040/table1Characteristics of our final 285 RRLs in DracoSimbadNameSimbad column added by the CDSmeta.idcharnullableTypeRRL typesrc.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRA_ICRSRight ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainRefReferences in literature where the source was classified as RRL (1)meta.refcharPeriodPulstation perioddtime.perioddoubleAmpV-band amplitudemagphot.magfloatplxGaia DR2 parallaxmaspos.parallax.trigfloate_plxError on plxmasstat.error;pos.parallaxfloat_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedpmRAGaia DR2 proper motion in right ascensionmas/yrpos.pm;pos.eq.rafloate_pmRAError on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEGaia DR2 proper motion in declinationmas/yrpos.pm;pos.eq.decfloate_pmDEError on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmagGaia DR2 G-band magnitudemagphot.mag;em.optfloatr_GmagReference for Gmag (2)meta.refintmuDistance modulusmagphot.mag.distModfloatJ/MNRAS/499/4040/table2New RRLs in Draco discovered by GaiarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRefReference for the data (1)meta.ref;pos.framecharPeriodPulstation perioddtime.perioddoubleAmpG-band amplitudemagsrc.var.amplitudefloatGmagGaia DR2 G-band magnitudemagphot.mag;em.optfloate_GmagError on Gmagmagstat.error;phot.magfloatTypeRRL typesrc.classcharJ/MNRAS/499/4040/table3RRLs whose membership to Draco is uncertainPeriodPulsation perioddtime.perioddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRA_ICRSRight ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainRefSource of the datameta.bibcharmuDistance modulusmagphot.mag.distModfloate_muError on mumagstat.errorfloatAngDistAngular distance from the centre of Draco according to Kinemuchi et al. (2008AJ....136.1921K, Cat. J/AJ/136/1921)degpos.angDistancefloatJ/MNRAS/499/4040/table4Characteristics of 51 candidate RRLs discarded from the Draco RRLsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2? Gaia DR2 source identifiermeta.id;meta.mainnullablef_GaiaDR2Flag on GaiaDR2 (1)meta.codecharRA_ICRSRight ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainRefReferences in literature where the source was included (2)meta.refcharJ/MNRAS/499/4040/table5Candidate RRLs in Draco selected from the Gaia DR2 catalogue based on the dispersion of their G-band magnitudes ({sigma}_G_)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRA_ICRSRight ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainGmagGaia DR2 G-band magnitudemagphot.mag;em.optfloate_GmagError on Gmagmagstat.error;phot.magfloat